Nanomechanical characterization and fracture toughness of FeB and Fe 2 B iron borides produced by gas boriding of Armco iron

Kulka, Michał; Makuch, Natalia; Piasecki, Adam

doi:10.1016/j.surfcoat.2017.07.020

Cited by 113 publications

(58 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…3(b). These grains are Fe 2 B columns, formed through the diffusion of boron atoms [28], which were noted to grow perpendicular to the surface in a needle-like manner [29]. FeB is not considered due to the detection of its poor signals.…”

Section: Phase Analysis Microstructure and Hardnessmentioning

confidence: 99%

Pack-boriding of low alloy steel: microstructure evolution and migration behaviour of alloying elements

Litoria

Figueroa

Bim

et al. 2019

Philosophical Magazine

View full text Add to dashboard Cite

Low alloy steel was pack-borided at different processing temperatures (at 850, 950, and 1050 o C) and times (2, 4, and 6 h). The microstructural characterization of boronized steel showed the presence of three zones, namely boronized region containing finer grains and columnar geometry of (Fe, M) 2 B (where M = Cr, Mn, Mo, and Ni), transition zone, and non-boronized core. The concentrations of the alloying elements in (Fe, M) 2 B were increased from the surface to the core of the specimen. The pattern of slope variation of boron concentration-depth profile (obtained using GDOES) was linked with the boride morphology and process temperature. Pack-boriding of steel led to the development of systematic trend in slope variation of overall concentrationdepth profiles of the alloying elements. The composition and morphology of boride affected the trend of slope variation for the boride-forming alloying elements. However, for Al and Si, the trend of slope variation was connected to the boride morphology and the composition of the matrix. Chemistry of the matrix was strongly dependent on the migration kinetics of the alloying elements during the boride growth. The migration kinetics of Cr, Mn, Mo, and C were found almost equivalent to the rate of boride growth. However, Ni, Al, and Si were migrated at a slower rate. Si showed the lowest migration kinetics among the alloying elements. The concentrations of the alloying elements having higher migration kinetics remained constant in the matrix during the boride growth.

show abstract

Section: Phase Analysis Microstructure and Hardnessmentioning

confidence: 99%

Pack-boriding of low alloy steel: microstructure evolution and migration behaviour of alloying elements

Litoria

Figueroa

Bim

et al. 2019

Philosophical Magazine

View full text Add to dashboard Cite

show abstract

“…Aşınma deneyleri sonucunda borlama sıcaklığına ve süresine bağlı olarak aşınma hızı ve sürtünme grafikleri Şekil 7'de verilmiştir. et al , Kulka et al 2017. Tüm bunlara bağlı olarak kırılan tabaka abraziv aşınma sergileyerek aşınma direncinde düşüş gözlenmiştir.…”

Section: Aşınma Testi Analiziunclassified

Plazma Pasta Borlama Yöntemiyle Borlanmış AISI D2 Çeliğinin Aşınma ve Elektrokimyasal Korozyon Davranışlarının İncelenmesi

Kayalı¹

2019

Afyon Kocatepe University Journal of Sciences and Engineering

View full text Add to dashboard Cite

Bu çalışmada, AISI D2 soğuk iş takım çeliği, 700 ve 750 C işlem sıcaklıklarında 2 ve 4 saat süreyle %70 H2-%30 Ar gaz karışımında, 10 mbar basınç altında ve ağırlıkça %100 Boraks pasta kullanılarak plazma pasta borlama yöntemi ile borlanmıştır. Deneyler sonucunda, çelik yüzeylerinde oluşan borür tabakalarının morfolojisi optik mikroskobu ile incelenmiştir. Sertlik değerleri, mikro-sertlik cihazı ile ölçülmüş ve tabaka üzerinde oluşturulan fazlar XRD yöntemi ile belirlenmiştir. XRD analizinde FeB, Fe2B ve CrB fazlarının borür tabakasının üzerinde oluştuğu görülmüştür. Sonuç olarak, borlanmış çeliklerde elde edilen borür tabakasının kalınlığının artan borlama sıcaklık ve süresi ile artığı görülmüştür. AISI D2 çeliğinin orijinal sertlik değeri 452 HV0,05 iken, borlama işlemi sonucunda, 1789 HV0,05 gibi oldukça yüksek bir değere arttığı tespit edilmiştir. Borlama işlemi, AISI D2 çeliğinin aşınma direncini artırırken, artan borlama sıcaklığı ve süresiyle azalma meydana gelmiştir. AISI D2 çeliğinin yüzey sertliği borlama işlemi ile artmıştır. Elektrokimyasal deneyler sonucunda, borlanmış çeliklerdeki korozyon direnci, borlanmamış çeliğe göre korozyon direnci artmıştır. Fakat artan borlama sıcaklığı ve süresi ile birlikte korozyon direnci biraz düşmüştür.

show abstract

“…The difference among the reported values obtained by nanomechanical characterization are often prescribed to mixed phase effect, porosity, residual stresses, and differences in chemical composition of the substrate material [ 29 ]. In order to eliminate the substrate influence, Kulka et al [ 27 ] conducted a boronizing study on pure iron (Armco iron). Berkovich nanoindentation measurement resulted in the following hardness values: FeB = 19.77–29.35 GPa and Fe 2 B = 16.09–18.51 GPa [ 27 ], and indentation modulus of FeB = 271.89–360.16 GPa and Fe 2 B = 231.52–275.37 GPa [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

The Influence of the Third Element on Nano-Mechanical Properties of Iron Borides FeB and Fe2B Formed in Fe-B-X (X = C, Cr, Mn, V, W, Mn + V) Alloys

et al. 2020

View full text Add to dashboard Cite

In this study, the influence of alloying elements on the mechanical properties of iron borides FeB and Fe2B formed in Fe-B-X (X = C, Cr, Mn, V, W, Mn + V) alloys were evaluated using instrumented indentation measurement. The microstructural characterization of the alloys was performed by means of X-ray diffraction and scanning electron microscope equipped with an energy dispersive X-ray analyzer. The fraction of the phases present in the alloys was determined either by the lever rule or by image analysis. The hardest and stiffest FeB formed in Fe-B-X (X = C, Cr, Mn) alloys was observed in the Fe-B-Cr alloys, where indentation hardness of HIT = 26.9 ± 1.4 GPa and indentation modulus of EIT = 486 ± 22 GPa were determined. The highest hardness of Fe2B was determined in the presence of tungsten as an alloying element, HIT = 20.8 ± 0.9 GPa. The lowest indentation hardness is measured in manganese alloyed FeB and Fe2B. In both FeB and Fe2B, an indentation size effect was observed, showing a decrease of hardness with increasing indentation depth.

show abstract

Nanomechanical characterization and fracture toughness of FeB and Fe 2 B iron borides produced by gas boriding of Armco iron

Cited by 113 publications

References 51 publications

Pack-boriding of low alloy steel: microstructure evolution and migration behaviour of alloying elements

Pack-boriding of low alloy steel: microstructure evolution and migration behaviour of alloying elements

Plazma Pasta Borlama Yöntemiyle Borlanmış AISI D2 Çeliğinin Aşınma ve Elektrokimyasal Korozyon Davranışlarının İncelenmesi

The Influence of the Third Element on Nano-Mechanical Properties of Iron Borides FeB and Fe2B Formed in Fe-B-X (X = C, Cr, Mn, V, W, Mn + V) Alloys

Contact Info

Product

Resources

About